Having your email up in the cloud is very convenient, until your Internet connection is down or email provider is having technical issues. In situations like these, having a searchable backup of all your emails which you can access locally can be a real life-saver. Fortunately, setting up an email archiving solution isn't all that difficult, and you can use a Raspberry Pi (or any spare machine for that matter) for that.

If you happen to use imgur as your preferred image hosting and sharing service, you'll appreciate Imgur Mushroom. This little open source app allows you to tweak and upload images from your Android device to imgur with consummate ease.